CN116800201A - Solar power generation operation monitoring method, device and storage medium - Google Patents
Solar power generation operation monitoring method, device and storage medium Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 248
- 238000010248 power generation Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000002159 abnormal effect Effects 0.000 claims abstract description 43
- 238000011156 evaluation Methods 0.000 claims abstract description 27
- 239000000428 dust Substances 0.000 claims description 29
- 238000004458 analytical method Methods 0.000 claims description 24
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- 238000012937 correction Methods 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 11
- 238000007667 floating Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000012790 confirmation Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 3
- 230000005764 inhibitory process Effects 0.000 abstract description 3
- 230000002238 attenuated effect Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
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- 238000010835 comparative analysis Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
- H02S50/15—Testing of PV devices, e.g. of PV modules or single PV cells using optical means, e.g. using electroluminescence
Abstract
The invention relates to the technical field of solar power generation operation monitoring, and particularly discloses a solar power generation operation monitoring method, equipment and a storage medium. According to the solar power generation operation monitoring method, the output power and the operation environment information of each solar battery pack are monitored, so that the corresponding attenuation rate of each solar battery pack is analyzed, the abnormal attenuation solar battery pack is pre-warned, the deep monitoring of the attenuation rate of the solar battery pack and the timely pre-warning of the abnormal attenuation solar battery pack are realized, the problem that certain limitation exists in the attenuation monitoring of the current solar battery pack is effectively solved, the authenticity and the rationality of the attenuation rate evaluation result of the solar battery pack are improved, meanwhile, the operation stability and the operation safety of the solar battery pack are effectively improved, the defects of a current general monitoring mode are overcome, and a clear direction is provided for attenuation inhibition of a solar power generation battery.
Description
Technical Field
The invention belongs to the technical field of solar power generation operation monitoring, and relates to a solar power generation operation monitoring method, equipment and a storage medium.
Background
Solar power generation assemblies are installed outdoors, and have more or less certain loss in the operation process. Particularly, with the operation and use of the solar power generation assembly in one year, the function of the solar power generation assembly is attenuated, and the attenuation of the solar power generation assembly directly influences the operation efficiency of the solar power generation assembly, so that the operation attenuation state of the solar power generation assembly needs to be monitored in order to ensure the operation efficiency of the solar power generation assembly.
Currently, the operation attenuation state of a solar power generation assembly is monitored, the output power of a solar battery pack is mainly monitored, and the attenuation rate of the assembly for solar power generation is confirmed based on the output power. It is apparent that the current technology has several problems as follows: 1. the attenuation of the solar battery pack is influenced by a plurality of dimensions such as operation time length and climate, and only the attenuation analysis is carried out from the dimension of output power, so that certain limitations exist, the attenuation state of the solar battery pack cannot be truly reflected, the rationality of monitoring the attenuation state of the solar battery pack cannot be improved, and meanwhile, the stability and safety of the operation of the solar battery pack cannot be maintained.
2. The shading effect can be generated when the solar battery pack is shaded in the solar power generation process, namely the solar battery pack can generate heat unevenly when the solar battery pack is partially shaded, the attenuation degree of the solar battery pack can be increased, certain potential safety hazards are caused for the solar battery pack, the solar battery pack is not monitored and analyzed currently, and the accuracy, the reference and the reliability of attenuation monitoring of the solar battery pack can not be improved.
3. The attenuation of the solar battery pack is in a direct proportion to the light transmittance of the solar battery pack, when the attenuation of solar energy is monitored and evaluated at present, the attenuation is only compared with the initial condition, the influence of the environment on the light transmittance of the solar battery pack is not combined, the monitoring mode is more general, the actual attenuation state of the solar battery pack is monitored integrally, the deviation degree of the actual attenuation state and the predicted attenuation state of the solar battery pack in the operation process of the solar battery pack cannot be highlighted, and reliable decision-making reference advice cannot be provided for the follow-up maintenance optimization of the solar battery pack.
Disclosure of Invention
In view of this, in order to solve the problems set forth in the background art, a solar power generation operation monitoring method, apparatus and storage medium are now proposed;
the aim of the invention can be achieved by the following technical scheme: the invention provides a solar power generation operation monitoring method, which comprises the following steps: step S1, extracting solar battery pack operation information: and extracting the initial operation date and the rated attenuation rule corresponding to each solar battery set arranged in the designated power generation area, and numbering each solar battery set into 1,2 according to the set sequence.
Step S2, monitoring the power generation running state of the solar battery pack: and monitoring the output power of each solar battery pack according to the set monitoring period to obtain the output power corresponding to each monitoring day of each solar battery pack in the set monitoring period.
Step S3, extracting the power generation meteorological information of the solar battery pack: and extracting irradiance corresponding to each monitoring day in the set monitoring period of each solar battery pack.
Step S4, monitoring operation environment information of the solar battery pack: and monitoring the operation environment information corresponding to each monitoring day in the set monitoring period of each solar battery pack.
Step S5, setting environmental attenuation influence weights of the solar battery packs: setting corresponding environmental attenuation influence weights of each solar battery pack in a set monitoring period and marking as eta i I represents a solar cell stack number, i=1, 2.
Step S6, solar battery pack attenuation evaluation analysis: and analyzing the attenuation rate corresponding to each solar battery pack based on the output power corresponding to each monitoring day in the set monitoring period, thereby confirming the attenuation early warning requirement corresponding to each solar battery pack.
Step S7, early warning of abnormal operation of the solar battery pack: when a certain solar battery pack needs to carry out attenuation early warning, starting an abnormal operation instruction of the solar battery pack to carry out early warning.
In a preferred embodiment of the present invention, the monitoring of the operation environment information corresponding to each monitoring day in the set monitoring period includes the following specific monitoring process: and (3) carrying out image acquisition on the power generation peak time period of each solar battery pack in each monitoring day in a set monitoring period through cameras arranged in the layout area where each solar battery pack is positioned, and locating the position of the light receiving area and the position of the shadow area.
And starting each solar battery pack to perform temperature acquisition on each temperature sensor arranged in the position of a light receiving area and the position of a shadow area in each power generation peak time period in each monitoring day in a set monitoring period, so as to obtain each acquired temperature value.
And the temperature collector and the humidity collector arranged in the designated power generation area are used for monitoring the external temperature and the external humidity corresponding to each monitoring day in the set monitoring period in the designated power generation area in real time, and extracting the highest external temperature, the lowest external temperature and the lowest external humidity.
The dust concentration corresponding to each solar battery pack in each monitoring day in the set monitoring period is monitored in real time through dust monitoring sensors arranged in the layout area where each solar battery pack is located, and the real-time dust concentration corresponding to each solar battery pack in each monitoring day in the set monitoring period is obtained.
And taking the temperature values, the highest external temperature, the lowest external humidity and the real-time dust concentration which are acquired correspondingly at the position of the light receiving area and the position of the shadow area in the power generation peak time period as the operation environment information corresponding to each monitoring day of each solar battery pack in the set monitoring period.
In a preferred embodiment of the present invention, the setting of the environmental attenuation influence weights corresponding to each solar cell set in the set monitoring period specifically includes the following steps:
positioning each temperature value correspondingly collected in the position of a light receiving area and the position of a shadow area in the power generation peak time period from the operation environment information corresponding to each monitoring day in the set monitoring period of each solar battery pack, and further screening the highest temperature and the lowest temperature from the temperature values respectively;
the maximum temperature and the minimum temperature which are correspondingly collected by the position of the light receiving area in the power generation peak time period of each solar battery pack in each monitoring day in the set monitoring period are subjected to difference to obtain a first temperature rise value which corresponds to each solar battery pack in each monitoring day in the set monitoring period and is recorded as Deltaw it ，tRepresents monitoring period number, t=1, 2,..;
the highest temperature and the lowest temperature which are acquired correspondingly by the position of the shadow area in the power generation peak time period of each solar battery pack in the set monitoring period are differed to obtain the corresponding second temperature rise value of each solar battery pack in each monitoring period in the set monitoring period, and the second temperature rise value is recorded as Deltaw i ′ t ；
The highest external temperature and the lowest external temperature are positioned from the corresponding operation environment information of each solar battery group in each monitoring day in the set monitoring period, and the difference is obtained to obtain the external temperature difference corresponding to each solar battery group in each monitoring day in the set monitoring period, which is recorded as Deltaw i ′ t ′；
Positioning the lowest external humidity from the corresponding operation environment information of each solar battery pack in each monitoring day in the set monitoring period, and marking as R it ；
Positioning real-time dust concentration from corresponding operation environment information of each solar battery pack in each monitoring day in a set monitoring period, calculating average dust concentration by means of average calculation, and recording as
Analyzing according to an analysis formula to obtain a corresponding environmental attenuation influence weight eta of each solar battery pack in a set monitoring period it 。
In a preferred embodiment of the present invention, the specific analysis formula of the environmental attenuation influence weight corresponding to each solar cell set in the set monitoring period is as followsα1, α2 and α3 are respectively expressed as the set duty ratio weights corresponding to the solar battery temperature rise attenuation influence, the external temperature and humidity attenuation influence and the dust concentration attenuation influence, and ε 1 i 、ε2 i 、ε3 i Respectively expressed as the corresponding temperature rise attenuation influence weight and the external temperature and humidity attenuation influence weight of the ith solar battery pack in the set monitoring periodThe dust concentration decay affects the weight.
wherein ,Δw 0 for the set rated load-bearing operation temperature rise value sigma of the solar battery pack 0 And evaluating a correction factor for the set temperature rise attenuation influence weight, wherein e is a natural constant.
Δw 1 R' are respectively set external temperature difference and maximum external humidity value of rated load of the solar battery pack, and b1 and b2 are respectively set compensation factors corresponding to the external temperature difference and the external humidity difference, sigma 1 And evaluating the correction factors for the set outside temperature attenuation influence weights.
c' is the set allowable dust concentration value, sigma, of the solar battery pack 2 And evaluating a correction factor for the set dust concentration attenuation influence weight.
In a preferred embodiment of the present invention, the analyzing the attenuation rate corresponding to each solar cell group includes the following steps: and setting the monitoring date as an abscissa and the output power as an ordinate, fitting the output power corresponding to each monitoring day in the set monitoring period of each solar battery, and outputting an output power curve graph corresponding to each solar battery.
And extracting the output power corresponding to the solar battery pack under the standard irradiance and the standard temperature from the solar power generation information base, analyzing and obtaining the expected output power corresponding to each monitoring day of each solar battery pack in the set monitoring period based on the output power corresponding to each monitoring day of each solar battery pack in the set monitoring period, and fitting to obtain an expected output power curve graph corresponding to each solar battery pack.
And overlapping and comparing the output power curve graph corresponding to each solar battery with the expected output power curve graph corresponding to each solar battery to obtain an output power overlapping curve graph corresponding to each solar battery.
Extracting the length of the coincidence curve and the number of the coincidence curve segments from the coincidence curve graph of the corresponding output power of each solar battery pack, and respectively marking as L Superposition i and DSuperposition i 。
And extracting the relative orientation of each non-coincident curve section from the corresponding output power coincident curve graph of each solar battery, if the output power curve in a certain non-coincident curve section in the corresponding output power coincident curve graph of a certain solar battery is positioned below the predicted output power curve, marking the non-coincident curve section as an abnormal curve section, counting the abnormal curve section number of the corresponding output power coincident curve graph of each solar battery, and extracting the deviation height corresponding to each abnormal curve section.
And analyzing according to an analysis formula to obtain that the attenuation rate corresponding to each solar battery pack accords with the evaluation index.
In a preferred embodiment of the present invention, the specific analysis formula of the predicted output power corresponding to each monitoring day in the set monitoring period of each solar battery is as followsP it ' expressed as the expected output power corresponding to the ith monitoring day of the ith solar cell stack in the set monitoring period, P 0 For the corresponding output power of the solar battery pack under the standard irradiance and the standard temperature, F it For irradiance corresponding to the ith monitoring day in the set monitoring period of the ith solar battery pack, F Standard of For the corresponding standard irradiance of the solar cell stack, < ->And outputting a power floating compensation factor for the set solar battery pack.
In a preferred embodiment of the present invention, the specific analytical formula of the decay rate coincidence evaluation index corresponding to each solar cell set is as followsλ i Expressed as an i-th solar battery pack corresponding attenuation rate evaluation index, mu 1, mu 2, mu 3 and mu 4 are respectively expressed as set coincidence curve length, coincidence curve segment number, abnormal curve segment number and duty ratio weight factor corresponding to deviation height, and xi is set attenuation rate evaluation correction factor, L Reference to 、D Reference to 、M Reference to H' are respectively the set length of the reference coincidence curve, the number of the reference coincidence curve segments, the number of the reference abnormal curve segments and the deviation height of the reference abnormal curve, M i Representing the number of abnormal curve segments corresponding to the ith solar battery pack, H if And (3) the corresponding deviation height of the ith solar cell group in the f abnormal curve section.
In a preferred embodiment of the present invention, the confirming the attenuation early warning requirement corresponding to each solar battery pack specifically includes: and obtaining the corresponding accumulated operation time length of each solar battery pack based on the corresponding initial operation date of each solar battery pack.
And extracting corresponding allowable attenuation coincidence deviation degree in each rated operation period from the rated attenuation rule corresponding to each solar battery pack, thereby obtaining corresponding allowable attenuation coincidence deviation degree of each solar battery pack based on the corresponding accumulated operation time length of each solar battery pack.
And (3) based on the attenuation rate evaluation coincidence index corresponding to each solar battery, analyzing to obtain the actual attenuation coincidence deviation degree corresponding to each solar battery, comparing the actual attenuation coincidence deviation degree corresponding to each laid solar battery with the permissible attenuation coincidence deviation degree, and if the actual attenuation coincidence deviation degree of a certain solar battery is larger than the permissible attenuation coincidence deviation degree, judging that the solar battery operates abnormally and carrying out attenuation early warning.
The invention provides a solar power generation operation monitoring device, comprising: a processor, a memory and a network interface connected with the processor; the network interface is connected with a nonvolatile memory in the server; the processor retrieves the computer program from the nonvolatile memory through the network interface during operation, and operates the computer program through the memory to execute the solar power generation operation monitoring method.
The invention also provides a solar power generation operation monitoring storage medium, which is burnt with a computer program, and the computer program realizes the solar power generation operation monitoring method when running in the memory of the server.
Compared with the prior art, the invention has the following beneficial effects:
according to the solar power generation operation monitoring method, the output power and the operation environment information of each solar battery pack are monitored, so that the corresponding attenuation rate of each solar battery pack is analyzed, the abnormally attenuated solar battery pack is early-warned, the deep monitoring of the attenuation rate of the solar battery pack and the timely early warning of the abnormally attenuated solar battery pack are realized, the problem that certain limitation exists in the attenuation monitoring of the current solar battery pack is effectively solved, the authenticity and the rationality of the attenuation rate evaluation result of the solar battery pack are improved, meanwhile, the operation stability and the operation safety of the solar battery pack are also effectively improved, the defect existing in the current general monitoring mode is overcome, and on the other hand, reliable decision-making reference advice is provided for the follow-up maintenance optimization of the solar battery pack, and a clear direction is also provided for attenuation inhibition of a solar power generation battery.
According to the invention, when the attenuation rate corresponding to each solar battery pack is analyzed, the output power curve graph corresponding to each solar battery pack and the expected output power curve graph corresponding to each solar battery pack are set, and comprehensive analysis is performed by combining the environmental attenuation influence weights, so that on one hand, the intuitiveness of attenuation evaluation of the solar battery pack is improved based on a comparative analysis mode of the curve graph, the deviation condition of the actual attenuation state and the predicted attenuation state of the solar battery pack in the running process of the solar battery pack is highlighted, the attenuation dynamic rule of the solar battery pack in a set monitoring period can be known, and convenience is provided for the attenuation management of the subsequent solar battery packs; on the other hand, by combining the attenuation influence weight of the running environment, the persuasion of the solar battery attenuation rate analysis result is improved, and meanwhile, the accuracy, the reference and the reliability of the solar battery attenuation monitoring are greatly improved.
According to the invention, the environmental attenuation influence weight is carried out based on the operation environment information corresponding to each monitoring day of each solar battery in the set monitoring period, so that not only is the theoretical basis of the attenuation rate evaluation of the solar battery expanded, but also the environment state of the solar battery in the operation scene is displayed, thereby improving the vigilance of the operation environment of the solar battery and the awareness rate of the abnormal operation environment, and simultaneously, the eradication rate of the operation potential safety hazard of the solar battery is effectively improved, and further the further attenuation of the solar battery is greatly delayed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the steps of the method of the present invention.
Detailed Description
The foregoing is merely illustrative of the principles of the invention, and various modifications, additions and substitutions for those skilled in the art will be apparent to those having ordinary skill in the art without departing from the principles of the invention or from the scope of the invention as defined in the accompanying claims.
Referring to fig. 1, the invention provides a solar power generation operation monitoring method, which comprises the following steps: step S1, extracting solar battery pack operation information: and extracting the initial operation date and the rated attenuation rule corresponding to each solar battery set arranged in the designated power generation area, and numbering each solar battery set into 1,2 according to the set sequence.
Specifically, the rated damping rules include, but are not limited to, corresponding allowable damping compliance deviations for each operating period and corresponding suitable damping rate compliance assessment indices for each operating period.
Step S2, monitoring the power generation running state of the solar battery pack: and monitoring the output power of each solar battery pack according to the set monitoring period to obtain the output power corresponding to each monitoring day of each solar battery pack in the set monitoring period.
Step S3, extracting the power generation meteorological information of the solar battery pack: and extracting irradiance corresponding to each monitoring day in the set monitoring period of each solar battery pack.
Step S4, monitoring operation environment information of the solar battery pack: and monitoring the operation environment information corresponding to each monitoring day in the set monitoring period of each solar battery pack.
Specifically, the operation environment information corresponding to each monitoring day of each solar battery pack in a set monitoring period is monitored, and the specific monitoring process is as follows: a1, acquiring images of power generation peak time periods in each monitoring day in a set monitoring period by using cameras arranged in the layout area where each solar battery pack is located, and positioning the position of a light receiving area and the position of a shadow area.
It should be noted that, in one embodiment, the peak power generation time period of the present invention is 11:00-14;00, other peak power generation time periods are also possible.
The light receiving region refers to a region that receives sunlight, and the shadow region refers to a light blocking region.
A2, starting each solar battery pack to collect the temperature in a light receiving area position and a shadow area position in each power generation peak time period in each monitoring day in a set monitoring period, and obtaining each collected temperature value.
A3, monitoring the corresponding external temperature and external humidity in each monitoring day in a set monitoring period in the designated power generation area in real time through a temperature collector and a humidity collector which are arranged in the designated power generation area, and extracting the highest external temperature, the lowest external temperature and the lowest external humidity.
And A4, carrying out real-time monitoring on the dust concentration corresponding to each solar battery pack in each monitoring day in a set monitoring period through dust monitoring sensors arranged in the layout area where each solar battery pack is located, so as to obtain the real-time dust concentration corresponding to each solar battery pack in each monitoring day in the set monitoring period.
And A5, taking the temperature values, the highest external temperature, the lowest external humidity and the real-time dust concentration which are acquired correspondingly to the position of the light receiving area and the position of the shadow area in the power generation peak time period as the operation environment information corresponding to each monitoring day of each solar battery pack in the set monitoring period.
Step S5, setting environmental attenuation influence weights of the solar battery packs: setting corresponding environmental attenuation influence weights of each solar battery pack in a set monitoring period and marking as eta i I represents a solar cell stack number, i=1, 2.
Specifically, setting the corresponding environmental attenuation influence weights of each solar battery pack in a set monitoring period, wherein the specific setting process comprises the following steps: b1, locating the position of a light receiving area and each temperature value correspondingly collected by the position of a shadow area in a power generation peak time period from the operation environment information corresponding to each monitoring day in a set monitoring period of each solar battery pack, and further screening the highest temperature and the lowest temperature from the position of the light receiving area and the position of the shadow area respectively.
B2, differentiating the highest temperature and the lowest temperature which are correspondingly collected by the position of the light receiving area in the power generation peak time period of each solar battery pack in each monitoring day in the set monitoring period to obtain a first temperature rise value corresponding to each solar battery pack in each monitoring day in the set monitoring period, and recording the first temperature rise value as Deltaw it T represents a monitoring period number, t=1, 2.
B3, correspondingly collecting the position of a shadow area in each solar battery pack in each monitoring day in the set monitoring period in the power generation peak time periodThe difference between the high temperature and the lowest temperature is carried out to obtain a corresponding second temperature rise value of each solar battery pack in each monitoring day in a set monitoring period, which is recorded as Deltaw i ′ t 。
B4, locating the highest external temperature and the lowest external temperature from the corresponding operation environment information of each solar battery pack in each monitoring day in the set monitoring period, and obtaining the external temperature difference corresponding to each solar battery pack in each monitoring day in the set monitoring period by taking the difference as Deltaw i ′ t ′。
B5, positioning the lowest external humidity from the corresponding operation environment information of each solar battery pack in each monitoring day in the set monitoring period, and marking as R it 。
B6, locating real-time dust concentration from the corresponding operation environment information of each solar battery pack in each monitoring day in the set monitoring period, calculating the average dust concentration in a mean value calculation mode, and recording as
B7, according to the analysis formulaAnalyzing to obtain corresponding environmental attenuation influence weights eta of the solar battery packs in a set monitoring period it Wherein alpha 1, alpha 2 and alpha 3 are respectively expressed as the set duty ratio weights, epsilon 1, corresponding to the temperature rise attenuation influence, the outside temperature and humidity attenuation influence and the dust concentration attenuation influence of the solar battery pack i 、ε2 i 、ε3 i The temperature rise attenuation influence weight, the external temperature and humidity attenuation influence weight and the dust concentration attenuation influence weight corresponding to the ith solar battery pack in the set monitoring period are respectively expressed.
wherein ,Δw 0 for the set rated load-bearing operation temperature rise value sigma of the solar battery pack 0 Evaluation and repair for set temperature rise attenuation influence weightPositive factor, e, is a natural constant.
Δw 1 R' are respectively set external temperature difference and maximum external humidity value of rated load of the solar battery pack, and b1 and b2 are respectively set compensation factors corresponding to the external temperature difference and the external humidity difference, sigma 1 And evaluating the correction factors for the set outside temperature attenuation influence weights.
c' is the set allowable dust concentration value, sigma, of the solar battery pack 2 And evaluating a correction factor for the set dust concentration attenuation influence weight.
According to the embodiment of the invention, the environmental attenuation influence weight is carried out based on the operation environment information corresponding to each monitoring day in the set monitoring period of each solar battery, so that the theoretical basis of the solar battery attenuation rate evaluation is expanded, the environment state in the operation scene of the solar battery is displayed, the vigilance of the operation environment of the solar battery and the awareness rate of the abnormal operation environment are improved, the eradication rate of the operation potential safety hazard of the solar battery is effectively improved, and further the further attenuation of the solar battery is greatly delayed.
Step S6, solar battery pack attenuation evaluation analysis: and analyzing the attenuation rate corresponding to each solar battery pack based on the output power corresponding to each monitoring day in the set monitoring period, thereby confirming the attenuation early warning requirement corresponding to each solar battery pack.
Specifically, the attenuation rate corresponding to each solar battery pack is analyzed, and the specific analysis process comprises the following steps: and C1, setting a monitoring date as an abscissa and setting output power as an ordinate, fitting the output power corresponding to each monitoring day in a set monitoring period, and outputting an output power curve graph corresponding to each solar battery.
And C2, extracting the output power corresponding to the solar battery pack under the standard irradiance and the standard temperature from the solar power generation information base, analyzing and obtaining the expected output power corresponding to each monitoring day of each solar battery pack in the set monitoring period based on the output power corresponding to each monitoring day of each solar battery pack in the set monitoring period, and fitting to obtain an expected output power curve graph corresponding to each solar battery pack.
The specific analysis formula of the expected output power corresponding to each monitoring day in the set monitoring period of each solar battery pack is as follows P it ' expressed as the expected output power corresponding to the ith monitoring day of the ith solar cell stack in the set monitoring period, P 0 For the corresponding output power of the solar battery pack under the standard irradiance and the standard temperature, F it For irradiance corresponding to the ith monitoring day in the set monitoring period of the ith solar battery pack, F Standard of For the corresponding standard irradiance of the solar cell stack, < ->And outputting a power floating compensation factor for the set solar battery pack.
The specific setting process of the floating compensation factor of the output power of the solar battery packs comprises extracting the corresponding environmental attenuation influence weights of each solar battery pack in a set monitoring period, calculating the average environmental attenuation influence weights corresponding to the solar battery packs through means, and recording as
Extracting the lowest environmental attenuation influence weight and the highest environmental attenuation influence weight from the environmental attenuation influence weights corresponding to each solar battery pack in a set monitoring period, and respectively marking the lowest environmental attenuation influence weight and the highest environmental attenuation influence weight as eta min and ηmax 。
Averaging the corresponding solar battery packsEnvironment attenuation influence weight and minimum environment attenuation influence weight import formulaObtaining the output power floating compensation factor of the solar battery pack >u1, u2 and u3 are respectively expressed as set ambient attenuation deviation, ambient attenuation lower limit deviation and output power floating evaluation duty ratio weight corresponding to ambient attenuation upper limit deviation, eta' and delta eta are respectively expressed as set allowable ambient attenuation influence weight and allowable ambient attenuation influence weight floating difference, tau is a set power floating evaluation correction coefficient, K is a set reference solar cell set output power floating coefficient, and delta K is a set reference solar cell set output power floating coefficient difference.
And C3, overlapping and comparing the output power curve graph corresponding to each solar battery with the expected output power curve graph corresponding to each solar battery to obtain an output power overlapping curve graph corresponding to each solar battery.
C4, extracting the superposition curve length and the superposition curve segment number from the superposition curve graph of the corresponding output power of each solar battery pack, and respectively marking as L Superposition i and DSuperposition i 。
C5, extracting the relative orientation of each non-coincident curve section from the corresponding output power coincident curve graph of each solar battery, if the output power curve in a certain non-coincident curve section in the corresponding output power coincident curve graph of a certain solar battery is positioned below the expected output power curve, recording the non-coincident curve section as an abnormal curve section, counting the abnormal curve section number of the corresponding output power coincident curve graph of each solar battery, extracting the deviation height corresponding to each abnormal curve section, and recording the abnormal curve section number of the corresponding output power coincident curve graph of each solar battery and the deviation height corresponding to each abnormal curve section as M respectively i and Hif F represents an abnormal curve segment number, f=1, 2.
The offset height corresponding to each abnormal curve segment refers to the maximum vertical height between the output power curve and the expected output power curve in each abnormal curve segment.
C6, according to the analysis formulaAnalyzing to obtain that the attenuation rate corresponding to each solar battery pack accords with an evaluation index, wherein mu 1, mu 2, mu 3 and mu 4 are respectively expressed as a set coincidence curve length, a coincidence curve segment number, an abnormal curve segment number and a duty ratio weight factor corresponding to a deviation height, and xi is a set attenuation rate evaluation correction factor and L Reference to 、D Reference to 、M Reference to H' are respectively the set reference coincidence curve length, the reference coincidence curve segment number, the reference abnormal curve segment number and the reference abnormal curve deviation height.
According to the embodiment of the invention, when the attenuation rate corresponding to each solar battery pack is analyzed, the output power curve graph corresponding to each solar battery pack and the expected output power curve graph corresponding to each solar battery pack are set, and comprehensive analysis is performed by combining the environmental attenuation influence weights, so that on one hand, the intuitiveness of attenuation evaluation of the solar battery packs is improved based on a comparative analysis mode of the curve graphs, the deviation condition of the actual attenuation state and the predicted attenuation state of the solar battery packs in the running process of the solar battery packs is highlighted, the attenuation dynamic rule of the solar battery packs in a set monitoring period can be known, and convenience is further provided for attenuation management of the subsequent solar battery packs; on the other hand, by combining the attenuation influence weight of the running environment, the persuasion of the solar battery attenuation rate analysis result is improved, and meanwhile, the accuracy, the reference and the reliability of the solar battery attenuation monitoring are greatly improved.
Further, the attenuation early warning requirement corresponding to each solar battery pack is confirmed, and the specific confirmation process is as follows: and Y1, obtaining the corresponding accumulated operation time length of each solar battery pack based on the corresponding initial operation date of each solar battery pack.
And Y2, extracting corresponding allowable attenuation coincidence deviation degree in each rated operation period from the rated attenuation rule corresponding to each solar battery pack, thereby obtaining corresponding allowable attenuation coincidence deviation degree of each solar battery pack based on the accumulated operation time length corresponding to each solar battery pack.
It should be noted that, based on the accumulated operation time length corresponding to each solar battery, the specific acquisition process for obtaining the allowable attenuation coincidence deviation degree corresponding to each solar battery is as follows: importing the accumulated operation time length corresponding to each solar battery pack into a formulaObtaining the corresponding accumulated operation period of each solar battery pack, wherein ∈10 is obtained>And (3) representing upward rounding, and positioning the corresponding allowable attenuation coincidence deviation degree of each solar battery pack from the corresponding allowable attenuation coincidence deviation degree in each rated operation period based on the corresponding accumulated operation period of each solar battery pack.
And Y3, based on the attenuation rate evaluation coincidence index corresponding to each solar battery, analyzing to obtain the actual attenuation coincidence deviation degree corresponding to each solar battery, comparing the actual attenuation coincidence deviation degree corresponding to each arranged solar battery with the permissible attenuation coincidence deviation degree, and if the actual attenuation coincidence deviation degree of a certain solar battery is larger than the permissible attenuation coincidence deviation degree, judging that the solar battery is abnormal in operation and needs to carry out attenuation early warning.
It should be noted that, the actual attenuation coincidence deviation corresponding to each solar battery pack is obtained through analysis, and the specific analysis formula process is as follows: based on the corresponding accumulated operation time length of each solar battery, the corresponding accumulated operation time length of each solar battery is obtained, and therefore the appropriate attenuation rate evaluation coincidence index in the corresponding accumulated operation time length of each solar battery is positioned from the rated attenuation rule corresponding to each solar battery and is recorded as lambda i ' through analytical formulasAnalyzing to obtain the corresponding actual attenuation coincidence deviation gamma of each distributed solar battery pack i 。
According to the embodiment of the invention, the attenuation early warning requirements corresponding to each solar battery pack are confirmed, so that management staff can conveniently and timely process the abnormal attenuation solar battery packs, the interference of subsequent power generation of the abnormal attenuation solar battery packs is reduced to the greatest extent, and meanwhile, the operation potential safety hazard caused by the abnormal attenuation of the solar battery packs is avoided as much as possible.
Step S7, early warning of abnormal operation of the solar battery pack: when a certain solar battery pack needs to carry out attenuation early warning, starting an abnormal operation instruction of the solar battery pack to carry out early warning.
According to the embodiment of the invention, the output power and the operation environment information of each solar battery pack are monitored, so that the corresponding attenuation rate of each solar battery pack is analyzed, and the abnormal attenuation solar battery pack is pre-warned, so that the deep monitoring of the attenuation rate of the solar battery pack and the timely pre-warning of the abnormal attenuation solar battery pack are realized, the problem that the attenuation monitoring of the current solar battery pack has certain limitation is effectively solved, the authenticity and the rationality of the result of the attenuation rate evaluation of the solar battery pack are improved, the operation stability and the operation safety of the solar battery pack are also effectively improved, the defect of the current general monitoring mode is overcome, and on the other hand, reliable decision-making reference suggestion is provided for the follow-up maintenance optimization of the solar battery pack, and an explicit direction is also provided for the attenuation inhibition of the solar battery.
The invention provides a solar power generation operation monitoring device, comprising: a processor, a memory and a network interface connected with the processor; the network interface is connected with a nonvolatile memory in the server; the processor retrieves the computer program from the nonvolatile memory through the network interface during operation, and operates the computer program through the memory to execute the solar power generation operation monitoring method.
The invention also provides a solar power generation operation monitoring storage medium, which is burnt with a computer program, and the computer program realizes the solar power generation operation monitoring method when running in the memory of the server.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar thereto, by those skilled in the art, without departing from the principles of the invention or beyond the scope of the appended claims.
Claims (10)
1. A solar power generation operation monitoring method is characterized in that: the method comprises the following steps:
Step S1, extracting solar battery pack operation information: extracting initial operation dates and rated attenuation rules corresponding to all solar battery packs arranged in a designated power generation area, and numbering all the solar battery packs into 1,2 according to a set sequence;
step S2, monitoring the power generation running state of the solar battery pack: monitoring the output power of each solar battery pack according to the set monitoring period to obtain the output power corresponding to each monitoring day of each solar battery pack in the set monitoring period;
step S3, extracting the power generation meteorological information of the solar battery pack: extracting irradiance corresponding to each monitoring day of each solar battery pack in a set monitoring period;
step S4, monitoring operation environment information of the solar battery pack: monitoring operation environment information corresponding to each monitoring day in a set monitoring period of each solar battery pack;
step S5, setting environmental attenuation influence weights of the solar battery packs: setting corresponding environmental attenuation influence weights of each solar battery pack in a set monitoring period and marking as eta i I represents a solar cell stack number, i=1, 2,..;
step S6, solar battery pack attenuation evaluation analysis: analyzing the attenuation rate corresponding to each solar battery pack based on the output power corresponding to each monitoring day in the set monitoring period, thereby confirming the attenuation early warning requirement corresponding to each solar battery pack;
Step S7, early warning of abnormal operation of the solar battery pack: when a certain solar battery pack needs to carry out attenuation early warning, starting an abnormal operation instruction of the solar battery pack to carry out early warning.
2. The solar power generation operation monitoring method according to claim 1, wherein: the specific monitoring process is as follows:
the method comprises the steps that image acquisition is carried out on power generation peak time periods of each solar battery pack in each monitoring day in a set monitoring period through cameras arranged in a layout area where each solar battery pack is located, and the position of a light receiving area and the position of a shadow area are located;
starting each solar battery pack to perform temperature acquisition on each temperature sensor arranged in the position of a light receiving area and the position of a shadow area in each monitoring peak time period in each monitoring day in a set monitoring period, so as to obtain each acquired temperature value;
the method comprises the steps that the temperature collector and the humidity collector arranged in a designated power generation area are used for monitoring the external temperature and the external humidity corresponding to each monitoring day in a set monitoring period in the designated power generation area in real time, and the highest external temperature, the lowest external temperature and the lowest external humidity are extracted;
The dust monitoring sensors arranged in the layout areas where the solar battery packs are positioned are used for monitoring the dust concentration corresponding to each monitoring day of each solar battery pack in real time in a set monitoring period to obtain the real-time dust concentration corresponding to each monitoring day of each solar battery pack in the set monitoring period;
and taking the temperature values, the highest external temperature, the lowest external humidity and the real-time dust concentration which are acquired correspondingly at the position of the light receiving area and the position of the shadow area in the power generation peak time period as the operation environment information corresponding to each monitoring day of each solar battery pack in the set monitoring period.
3. The solar power generation operation monitoring method according to claim 1, wherein: the specific setting process comprises the following steps of:
positioning each temperature value correspondingly collected in the position of a light receiving area and the position of a shadow area in the power generation peak time period from the operation environment information corresponding to each monitoring day in the set monitoring period of each solar battery pack, and further screening the highest temperature and the lowest temperature from the temperature values respectively;
The maximum temperature and the minimum temperature which are correspondingly collected by the position of the light receiving area in the power generation peak time period of each solar battery pack in each monitoring day in the set monitoring period are subjected to difference to obtain a first temperature rise value which corresponds to each solar battery pack in each monitoring day in the set monitoring period and is recorded as Deltaw it T represents the number of the monitoring period, t=1, 2, &..g.;
the highest temperature and the lowest temperature which are acquired correspondingly by the position of the shadow area in the power generation peak time period of each solar battery pack in the set monitoring period are differed to obtain the corresponding second temperature rise value of each solar battery pack in each monitoring period in the set monitoring period, and the second temperature rise value is recorded as Deltaw i ′ t ；
The highest external temperature and the lowest external temperature are positioned from the corresponding operation environment information of each solar battery group in each monitoring day in the set monitoring period, and the difference is obtained to obtain the external temperature difference corresponding to each solar battery group in each monitoring day in the set monitoring period, which is recorded as Deltaw i ′ t ′；
Positioning the lowest external humidity from the corresponding operation environment information of each solar battery pack in each monitoring day in the set monitoring period, and marking as R it ；
Positioning real-time dust concentration from corresponding operation environment information of each solar battery pack in each monitoring day in a set monitoring period, calculating average dust concentration by means of average calculation, and Is marked as
Analyzing according to an analysis formula to obtain a corresponding environmental attenuation influence weight eta of each solar battery pack in a set monitoring period it 。
4. A solar power operation monitoring method according to claim 3, wherein: the specific analysis formula of the environmental attenuation influence weight corresponding to each solar battery pack in the set monitoring period is as followsα1, α2 and α3 are respectively expressed as the set duty ratio weights corresponding to the solar battery temperature rise attenuation influence, the external temperature and humidity attenuation influence and the dust concentration attenuation influence, and ε 1 i 、ε2 i 、ε3 i The temperature rise attenuation influence weight and the external temperature and humidity attenuation influence weight are respectively expressed as the corresponding temperature rise attenuation influence weight and the external temperature and humidity attenuation influence weight of the ith solar battery pack in the set monitoring period;
wherein ,Δw 0 for the set rated load-bearing operation temperature rise value sigma of the solar battery pack 0 Evaluating a correction factor for the set temperature rise attenuation influence weight, wherein e is a natural constant;
Δw 1 r' are respectively set external temperature difference and maximum external humidity value of rated load of the solar battery pack, and b1 and b2 are respectively set compensation factors corresponding to the external temperature difference and the external humidity difference, sigma 1 Evaluating correction factors for the set outside temperature attenuation influence weights;
c' is the set allowable dust concentration value, sigma, of the solar battery pack 2 And evaluating a correction factor for the set dust concentration attenuation influence weight.
5. The solar power generation operation monitoring method according to claim 1, wherein: the specific analysis process for analyzing the attenuation rate corresponding to each solar battery pack comprises the following steps:
setting a monitoring date as an abscissa and setting output power as an ordinate, fitting the output power corresponding to each monitoring day of each solar battery pack in a set monitoring period, and outputting an output power curve graph corresponding to each solar battery pack;
extracting the output power corresponding to the solar battery packs under the standard irradiance and the standard temperature from a solar power generation information base, analyzing the output power corresponding to each monitoring day in a set monitoring period based on each solar battery pack, and obtaining the expected output power corresponding to each monitoring day in the set monitoring period by analyzing, so as to obtain an expected output power curve graph corresponding to each solar battery pack by fitting;
overlapping and comparing the output power curve graph corresponding to each solar battery with the expected output power curve graph corresponding to each solar battery to obtain an output power overlapping curve graph corresponding to each solar battery;
Extracting the length of the coincidence curve and the number of the coincidence curve segments from the coincidence curve graph of the corresponding output power of each solar battery pack, and respectively marking as L Superposition i and DSuperposition i ；
Extracting the relative position of each non-coincident curve section from the corresponding output power coincident curve graph of each solar battery, if the output power curve in a certain non-coincident curve section in the corresponding output power coincident curve graph of a certain solar battery is positioned below the predicted output power curve, marking the non-coincident curve section as an abnormal curve section, counting the number of abnormal curve sections of the corresponding output power coincident curve graph of each solar battery, and extracting the deviation height corresponding to each abnormal curve section;
and analyzing according to an analysis formula to obtain that the attenuation rate corresponding to each solar battery pack accords with the evaluation index.
6. The solar power generation operation monitoring method according to claim 5, wherein: the specific analysis formula of the predicted output power corresponding to each monitoring day of each solar battery pack in the set monitoring period is as followsP it ' expressed as the expected output power corresponding to the ith monitoring day of the ith solar cell stack in the set monitoring period, P 0 For the corresponding output power of the solar battery pack under the standard irradiance and the standard temperature, F it For irradiance corresponding to the ith monitoring day in the set monitoring period of the ith solar battery pack, F Standard of For the corresponding standard irradiance of the solar cell stack, < ->And outputting a power floating compensation factor for the set solar battery pack.
7. The solar power generation operation monitoring method according to claim 5, wherein: the specific analysis formula of the attenuation rate corresponding to each solar battery pack according with the evaluation index is thatλ i Expressed as an i-th solar battery pack corresponding attenuation rate evaluation index, mu 1, mu 2, mu 3 and mu 4 are respectively expressed as set coincidence curve length, coincidence curve segment number, abnormal curve segment number and duty ratio weight factor corresponding to deviation height, and xi is set attenuation rate evaluation correction factor, L Reference to 、D Reference to 、M Reference to H' are respectively the length of the set reference coincidence curve, the number of the reference coincidence curve segments and the parametersCounting abnormal curve segments, referencing abnormal curve deviation height, M i Representing the number of abnormal curve segments corresponding to the ith solar battery pack, H if And (3) the corresponding deviation height of the ith solar cell group in the f abnormal curve section.
8. The solar power generation operation monitoring method according to claim 7, wherein: the attenuation early warning requirements corresponding to each solar battery pack are confirmed, and the specific confirmation process is as follows:
Obtaining the corresponding accumulated operation time length of each solar battery pack based on the corresponding initial operation date of each solar battery pack;
extracting corresponding allowable attenuation coincidence deviation degree in each rated operation period from the rated attenuation rule corresponding to each solar battery pack, thereby obtaining corresponding allowable attenuation coincidence deviation degree of each solar battery pack based on the corresponding accumulated operation time length of each solar battery pack;
and (3) based on the attenuation rate evaluation coincidence index corresponding to each solar battery, analyzing to obtain the actual attenuation coincidence deviation degree corresponding to each solar battery, comparing the actual attenuation coincidence deviation degree corresponding to each laid solar battery with the permissible attenuation coincidence deviation degree, and if the actual attenuation coincidence deviation degree of a certain solar battery is larger than the permissible attenuation coincidence deviation degree, judging that the solar battery operates abnormally and carrying out attenuation early warning.
9. A solar power generation operation monitoring device is characterized in that: comprising the following steps: a processor, a memory and a network interface connected with the processor; the network interface is connected with a nonvolatile memory in the server; the processor, when running, retrieving a computer program from the non-volatile memory via the network interface and running the computer program via the memory to perform the method of any of the preceding claims 1-8.
10. A solar power generation operation monitoring storage medium, characterized in that: the solar power generation operation monitoring storage medium is burnt with a computer program, which when run in the memory of a server implements the method of any of the preceding claims 1-8.
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